Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Operational amplifier wikipedia , lookup
Schmitt trigger wikipedia , lookup
Tektronix analog oscilloscopes wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Power MOSFET wikipedia , lookup
Surge protector wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Current mirror wikipedia , lookup
Opto-isolator wikipedia , lookup
OPERATING INSTRUCTION AD-9962 True RMS AUTORANGING DIGITAL MULTIMETER V ¦ ¸ V ¦ ¸ A mA 1 SAFETY WARNINGS The following safety information must be observed to insure maximum personal safety during the operation at this meter: Measurements beyond the maximum selected range must not be attempted. Extreme care must be taken when measuring above 50 V, especially on live bus-bars. To measure voltage, the instrument must not be switched to a current or resistance range, or to the diode check or buzzer position. Circuits must be de-energised and isolated before carrying out resistance tests. The rotary selector switch must only be turned after removing test connections. All external voltages must be disconnected from the instrument before removing the battery. Test leads and prods must be in good order, clean, and with no broken or cracked insulation. 2 UK Safety Authorities recommend the use of fused test leads when measuring voltage on high energy systems. Replacement fuses must be of the correct type and rating. The instrument must not be used if any part of it is damaged. Warnings and precautions must be read and understood before an instrument is used. They must be observed during the operation of this instrument. Symbols used on this instrument are: Caution: refer to accompanying notes. This symbol indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter. Caution: risk of electric shock This WARNING symbol indicates a 3 potentially hazardous situation, which if not avoided, could result in death or serious injury. This CAUTION symbol indicates a potentially hazardous situation, which if not avoided, may result damage to the product. MAX 500V This symbol advises the user that the terminal(s) so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds (in this case) 1000 VAC or VDC. Equipment protected throughout by Double Insulation (Class II) Equipment complies with current EU directives. 4 SYMBOLS AND ANNUNCIATORS ))) Continuity Low Battery Diode test HOLD Data Hold AUTO AutoRanging AC Alternating Current or Voltage DC Direct Current or Voltage V Volts A, mA,uA Current range OPERATION To turn on the instrument turn the range knob from the OFF position to any measurement range. Note: For best battery life ALWAYS turn the function switch to the OFF position when the meter is not in use. This meter has Auto OFF that automatically shuts the meter OFF if 30 minutes elapse between uses. NOTE: On some low AC and DC voltage ranges, with 5 the test leads not connected to a device, the display may show a random, changing reading. This is normal and is caused by the high-input sensitivity. The reading will stabilize and give a proper measurement when connected to a circuit. MODE button To select AC or DC measurement when in Voltages, Amps, mA , uA ,Ω, , ))),CAP,Hz,% . HOLD HOLD key is the reading hold control key that acts with trigger . The function is to hold the display of reading/backlight control . To press the key ,the display value will be locked and keep unchanged .To press the key again, the locked status will be erased and enter the normal measurement status. RANGE button When the meter is first turned on, it automatically goes into AutoRanging. This automatically selects the best range for the measurements being made and is generally the best mode for most measurements. For measurement situations requiring that a range be manually selected, perform the following: 6 1. Press the RANGE button. The “Auto Range” display indicator will turn off, The “Manual Range” display indicator will turn on 2. Press the RANGE button to step through the available ranges until you select the range you want. 3. Press and hold the RANGE button for 2 seconds to exit the ManualRanging mode and return to AutoRanging. REL button Rel Key is the relative value measurement key that acts with trigger. Except Hz/Duty, Diode and continuity,other functions can do the relative value measurement. MAX/MIN button The MAX/MIN function allows the meter to capture the highest or lowest measurement for later reference. 1. Press the MAX/MIN button to begin measurement. The indicator “MAX” or “MIN” will appear in the display. 2. If the “MAX MIN” messages are flashing, the instrument is in MAX/MIN mode but not recording, press the MAX/MIN button to select a mode. 3. To return to normal AUTO measurement mode, hold 7 down the MAX/MIN button for 2 seconds. BACKLIGHT button 1. Press the BACKLIGHT button to switch on the display light. 2. Press BACKLIGHT button again to exit the light mode. AC/DC VOLTAGE MEASUREMENT 1.Insert the black test lead into the negative COM terminal and the red test lead into the positive V terminal. 2. Set the function switch to the VAC or VDC position. 3.Use the MODE button to select AC or DC Voltage 4.Connect the test leads in parallel to the circuit under test. 5.Read the voltage measurement on the LCD display DC CURRENT MEASUREMENT 1. Insert the black test lead banana plug into the negative (COM) jack. 2. For current measurements up to 4000uA DC, set the function switch to the uA position and insert the red test lead banana plug into the (uA) jack. 8 3. For current measurements up to 400mA DC, set the function switch to the mA range and insert the red test lead banana plug into the (mA) jack. 4. For current measurements up to 10A DC, set the function switch to the A position and insert the red test lead banana plug into the 10A jack. 5. Press the AC/DC button until “DC” appears in the display. 6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current. 7. Touch the black test probe tip to the negative side of the circuit. Touch the red test probe tip to the positive side of the circuit. 8. Apply power to the circuit. 9. Read the current in the display. The display will indicate the proper decimal point, value and symbol. AC CURRENT MEASUREMENT 1. Insert the black test lead plug into the negative (COM) socket. 9 2. For current measurements up to 10A, set the function switch to the A position and insert the red test lead plug into the (10A) jack. 3. For current measurements up to 400mA, set the function switch to the mA range and insert the red test lead banana plug into the (mA) jack. 4. For current measurements up to 10A AC, set the function switch to the A position and insert the red test lead banana plug into the 10A jack. 5. Press the MODE button. The measurement mode will change between AC or DC as required. 6. Remove power from the circuit under test, then open up the circuit at the point where you wish to measure current. 7. Touch the black test probe tip to the negative side of the circuit. And touch the red test probe tip to the positive side of the circuit. 8. Apply power to the circuit. 9. Read the current in the display. The display will indicate the proper decimal point, value and symbol. 10 RESISTANCE [ Ω ] MEASUREMENT WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements. Remove the batteries and unplug the line cords. 1. Set the function switch to the Ω position. 2. Insert the black test lead plug into the negative (COM) socket and the red test lead plug into the positive Ω jack. 3. Press the MODE button until “Ω” appears in the display. 4. Touch the test probe tips across the circuit or part under test. It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading. 5. Read the resistance in the display. The display will indicate the proper decimal point, value and symbol. 11 CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. 1. Set the range switch to the ))) position. 2. Insert the black lead plug into the COM socket and the red test lead plug into the positive ))) socket. 3. Press the MODE button until “)))” appears in the display. 4. Touch the test probe tips to the circuit or wire you wish to check. 5. If the resistance is less than 35Ω, the audible signal will sound. The display will also show the actual resistance in ohms. DIODE TEST WARNING: To avoid electric shock, do not test any diode that has voltage on it. 1. Set the function switch to the position. 2. Insert the black test lead plug into the COM socket 12 and the red test lead plug into the 3. Press the MODE button until “ socket. ” appears in the display. 4. Touch the test probe tips to the diode or semiconductor junction you wish to test. Note the meter reading. 5. Reverse the probe polarity by switching probe position. Note this reading. 6. The diode or junction can be evaluated as follows: A. If one reading shows a value and the other reading shows OL, the diode is good. B. If both readings show OL, the device is open. C. If both readings are very small or zero, the device is shorted. NOTE: The value indicated in the display during the diode check is the forward voltage. CAPACITANCE MEASUREMENT WARNING: To avoid electric shock, discharge the capacitor under test before measuring. 1. Set the function switch to the CAP capacitance position. Press the MODE button until “nF” appears in the display. 13 2. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the CAP positive jack. 3. Touch the test probe tips across the part under test. 4. Read the capacitance value in the display. 5. The display will indicate the proper decimal point and value. Note: For very large values of capacitance measurement time can be several minutes before the final reading stabilizes. The bar graph is disabled in capacitance measurement mode. The LCD displays DIS. C .Discharging through the chip is quite slow. We recommend the user to discharge the capacitor with some other apparatus. FREQUENCY MEASUREMENT 1. Set the function switch to the Hz position. 2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead banana plug into the positive Hz jack. 3. Touch the test probe tips to the circuit under test. 14 4. Read the frequency in the display. The digital reading will indicate the proper decimal point, symbols ( Hz ,kHz, MHz) and value. TEMPERATURE MEASUREMENT 1. Set the function switch to the Temperature position. 2. Insert the Temperature Probe into the input jacks, making sure to observe the correct polarity. 3. Press the “ºF/ºC” button until “ºF or ºC” appears in the display. 4. Touch the Temperature Probe head to the part whose temperature you wish to measure. Keep the probe touching the part under test until the reading stabilizes (about 30 seconds). 5. Read the temperature in the display. Note: The temperature probe is fitted with a type K mini connector. A mini connector to banana connector adaptor is supplied for connection to the input banana jacks. 15 SPECIFICATIONS AD-9962 is the 4000 counts multimeters. They are a combination of precision, features, easy-to-use, safety and reliability. AD-9962 have True RMS AC voltage, Current readings. Technical: Insulation: Class2, Double insulation. Overvoltage category: CATIV 600V,CATIII 1000V NOTE: These meters meet CAT III and CAT IV IEC 61010 standards. The IEC 61010 safety standard defines four overvoltage categories (CAT I to IV) based on the magnitude of danger from transient impulses. CAT III meters are designed to protect against transients in fixed-equipment installations at the distribution level; CAT IV meters are designed to protect against transients from the primary supply level (overhead or underground utility service). Maximun voltage between any terminal and earth ground: Display: 1000V DC/AC RMS 4000 counts LCD display, 21mm high 16 Diode Test Test current of 0.9mA maximum, open circuit voltage 2.8V DC typical Temperature Sensor Requires type K thermocouple The term stands for “Root-Mean-Square,” AC True RMS: which represents the method of calculation of the voltage or current value. Average responding multimeters are calibrated to read correctly only on sine waves and they will read inaccurately on non-sine wave or distorted signals. True rms meters read accurately on either type of signal. ACV Bandwidth 40Hz to 1000Hz Polarity: Automatic, (-) negative polarity indication. Over-range: “OL” mark indication. Low battery indication: A battery “ “symbol is displayed when the battery voltage drops below the operating level. Measurement rate: 2 times per second nominal. Auto power off: Meter automatically shuts down after approx. 30 minutes of inactivity. Operating environment: -10 oC to 50 oC (14 oF to 122 oF) 17 at < 70 % relative humidity. Storage temperature: -30 oC to 60 oC (-4 oF to 140 oF) at < 80 % relative humidity.to Relative humidity: 90% (0oC to 30oC); 75%(30oC to 40oC); 45%(40oC to 50oC); For inside use, max height: Operating:3000m, Storage 10,000m Pollution degree: 2 Safety: The instrument complies with IEC/EN 61010-1:2001 and IEC/EN 61010-031:2002 Power: One 9V battery , NEDA 1604, IEC 6F22. Dimensions: 182 (H) x 82 (W) x55 (D) mm Weight: Approx.: 375g. Accuracy Accuracy is given at 18 oC to 28 oC (65 oF to 83 oF), less than 70 % RH DC Voltage (Auto-ranging) Range Resolution 400.0mV 0.1mV 4.000V 1mV 40.00V 10mV AD-9962 +0.8% of rdg + 2 digits 18 400.0V 100mV 1000V 1V +1.0% of rdg + 2 digits Input Impedance: 10MΩ. Maximum Input: 1000V dc or 1000V ac rms. AC Voltage (Auto-ranging) Range Resolution 400.0mV 0.1mV 4.000V 1mV 40.00V 10mV 400.0V 100mV 1000V 1V AD-9962 +1.0%of rdg + 3 digits +1.2%of rdg + 5 digits All AC voltage ranges are specified from 5% of range to 100% of range Input Impedance: 10MΩ. AC Response: 50 Hz to 400Hz Maximum Input: 1000V dc or 1000V ac rms. DC Current (Auto-ranging) Range Resolution AD-9962 19 400.0uA 0.1uA 4000uA 1uA 40.00mA 10uA 400.0mA 100uA 10A 10mA +1.2% of rdg + 5 digits +1.5% of rdg + 5 digits Overload Protection: FF500mA / 1000V and F10A / 1000V Fuse. Maximum Input: 400uA dc on uA range 400mA dc on mA range 10A dc on 10A range. AC Current (Auto-ranging) Range Resolution 400.0uA 0.1uA 4000uA 1uA 40.00mA 10uA 400.0mA 100uA 10A 10mA AD-9962 +1.5% of rdg + 5 digits +1.8% of rdg + 5 digits All AC Current ranges are specified from 5% of range to 100% of range Overload Protection:FF500mA/1000V Fuse. AC Response: 50 Hz to 400 Hz 20 and F10A/1000V Maximum Input: 400uA ac rms on uA 400mA ac rms on mA 10A ac rms on 10A range. Resistance [Ω] (Auto-ranging) Range Resolution AD-9962 400.0Ω 0.1Ω +1.2% of rdg + 5 digits 4.000kΩ 1Ω 40.00kΩ 10Ω 400.0kΩ 100Ω 4.000MΩ 1kΩ 40.00MΩ 10kΩ +1.2% of rdg + 2 digits +2.5% of rdg +8digits Input Protection: 1000V dc or 1000V ac rms. Capacitance (Auto-ranging) Range Resolution AD-9962 40.00nF 10pF +5.0% of rdg + 7 dgts 400.0nF 0.1nF +3.0% of rdg + 5 dgts 4.000uF 1nF 40.00uF 10nF 400.0uF 0.1uF 4.000mF 1 uF 40.00mF 10 uF +5.0% of rdg + 7 dgts Input Protection: 1000V dc or 1000V ac rms. 21 Frequency (Auto-ranging) Range Resolution AD-9962 4.000Hz 0.001Hz +1.0% of rdg + 3 dgts 40.00 Hz 0.01Hz 400.0 Hz 0.1Hz 4.000KHz 1 Hz 40.00kHz 10Hz 400.0kHz 100Hz 10.00MHz 1kHz +1.2% of rdg + 4 dgts ≤1MHz ; Sensitivity: >0.5V RMS while Sensitivity: >3V RMS while >1MHz ; Input Protection: 1000V dc or 1000V ac rms. Temperature Range Resolution AD-9962 -20oC~+760oC -4 oF~+1400 oF 1 oC 1 oF +3% of rdg +5dgts +3% of rdg +8dgts Sensor: Type K Thermocouple Overload protection: 1000V dc or ac rms.. Diode Test Test current Resolution 22 AD-9962 1Ma typical/Open 1 mV +10% of rdg MAX.3V + 5 digits Open circuit voltage: MAX. 3V dc Overload protection: 1000V dc or ac rms. Audible continuity Audible threshold: Less than 35Ω Test current MAX. 1.5mA Overload protection: 1000V dc or ac rms. BATTERY and FUSE replacement WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery door. 1. When the batteries become exhausted or drop below the operating voltage, the battery warning symbol will appear in the LCD display. The battery should be replaced. 2. Follow instructions for installing battery. See the Battery Installation section of this manual. 3. Dispose of the old battery properly. 23 WARNING: To avoid electric shock, do not operate your meter with the battery cover removed. BATTERY INSTALLATION WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the battery cover. Do not operate the instrument with the battery cover removed 1. Disconnect the test leads from the meter. 2. Open the battery cover by loosening the screw using a Phillips head screwdriver. 3. Insert the battery into battery holder, observing the correct polarity. 4. Put the battery cover back in place. Secure with the two screws. NOTE: If your meter does not work properly, check the fuses and battery to make sure that they are still good and that they are properly inserted. 24 REPLACING THE FUSES WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the fuse /battery cover. 1. Disconnect the test leads from the meter and any item under test. 2. Open the fuse door by loosening the screw on the door using a Phillips head screwdriver. 3. Remove the old fuse from its holder by gently pulling it out. 4. Install the new fuse into the holder. 5. Always use a fuse of the proper size and value (0.5A/1000V fast blow for the 400mA range, 10A/1000V fast blow for the 10A range). 6. Put the fuse door back in place. Insert the screw and tighten it securely. WARNING: To avoid electric shock, do not operate your meter until the fuse door is in place and fastened securely. 25